Quote:
Originally Posted by KingLT1
Actually they are not restrictive at all...and it's a 5-10% difference in volume level.
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Did someone do a DB test before and after? If so was it with or without NPP? My buddies with NPP on track sounded louder. I have an MBRP race axleback and was considering doing this but if it truly is only 5-10% it may not be worth the chance of a thrown code from crappy welds, or deteriorating welds fown the road.